While the RW is in the shop, I am going to increase the fuel capacity of the truck. Transfer Flow has an OEM Replacement that adds another 24 gallons or one in the bed that adds 60 plus keeps your original tank.

This is my stupid question and I cant test it myself because the RV is at the shop. Will a toolbox/gas tank combo that extends a couple inches above the rails cause a clearance problem for the Redwood?

I have the 60 gallon version by RDS that sits even with the top of my bed. I have it connected to my factory tank with their adapter kit. I think it's a great investment, especially on long trips. You can get different sizes as far as capacity and dimensions depending on how much bed space you are willing to give up.

I have the 60 gallon version by RDS that sits even with the top of my bed. I have it connected to my factory tank with their adapter kit. I think it's a great investment, especially on long trips. You can get different sizes as far as capacity and dimensions depending on how much bed space you are willing to give up.

Scott,
I have the transfer flow, 50 gallon, under the rail, in bed with a truxedo Duce cover. This gives me 87.5 gallons of fuel. Fuel is pumped from the auxiliary tank using their Trax3 system. It keeps the fuel at constant levels in both tanks, until you get to a certain level, then it drains the auxiliary tank first, leaving the balance in the main.